@rman9 whenever you are ready to try some power cords on your amplifier make sure the Audioquest high-current are on your list.
AQ Tornado is really good and Hurricane is even better. Probably two of the best power cords I ever tried on my amp.
@yyzsantabarbara I was running a 15ft long Mogami Gold Studio XLRs from pre to amp for a month or so but just moved all components closer together simply because my Acoustic Zen Absolute Copper XLRs are just much better. Depends what you’re comparing, what type of sonic compromises you’re willing to live with and for how long. That’s been my experience.